Make an ER diagram that could store information about applications to graduate schools. . Graduate schools have a name, an address, and a contact email. . Students have a name, a major, and a date of birth. . Students could apply to many graduate schools, but they need not apply to any. . A graduate school could have many students who apply to it, but they need not have any. . For each application, we keep track of the date of the application and the application status. . Students have reference letters. Each reference letter has an author, a date, and text. Each reference letter is for one student, and a student could have many reference letters. . Recruitment events have a location and a date. . Graduate schools can send a representative to many recruitment events, but need not send any. A recruitment event can have many graduate schools, but it must have at least one graduate school. We keep track of the name of the representative sent to a recruiting event by a graduate school. . Students can attend recruitment events, but need not attend any. A recruitment event can have many students attend it, but it must have at least one attend it.